Batteries dead after storage
2020 fifth wheel, two 6V golf cart batteries in series, 2,000 W inverter added last spring. In storage, disconnect off
Customer says: Every time we go to use it the batteries are dead, even with the disconnect off.
Tests you can run
- Ask what changed recently
- Battery voltage, rested
- Amps from the battery with the disconnect off (meter in series on the negative)
- Unplug the LP detector, watch the amps
- Disconnect the inverter's battery cable, watch the amps
- Trace where the inverter is wired
- Pull the fuses at the panel one at a time
- Replace the batteries
Repair options
The lesson behind this case
Keep going on 12V and batteries
Learn it
- Volts, amps and ohms, the simple way
- Voltage drop: the test that finds bad grounds
- Practice: find the bad connection
- Batteries: lead-acid vs lithium
- Fuses, breakers and grounds
Prove it
- Back lights are dim
- Battery dies even on shore power
- Lithium won't charge on cold mornings
- Coach is dead, battery is fine
- Solar quit charging